Yes, Mahito did die in the manga.
Well, in the manga, Yuji has a lot of growth and potential. However, Mahito is no pushover. His cursed spirit nature and devious tactics make him a force to be reckoned with. So, it's hard to say for sure who's stronger.
Misa did meet her end in the manga. This occurrence added a layer of complexity and drama to the overall narrative.
Sure did. Stain's death was a significant moment in the manga. It had an impact on the storyline and the characters around him.
No, Luffy didn't die in the manga. He's still going strong on his adventures.
No, Sanji didn't die. The character remains alive and plays an important role throughout the manga.
No, Deku doesn't die in the manga. The story continues with him as a central character.